TOURNAI (BE)
Quarry blast16 November 2018
- Magnitude
- 2.0ML
- Depth
- –
- Belgian time
- 10:52:192018-11-16
- UTC
- 09:52:192018-11-16
Main parameters
| Date and time | 2018-11-16 09:52:19 UTC 2018-11-16 10:52:19 Belgian time |
|---|---|
| Magnitude | ML 2.0 |
| Epicentral coordinates | 50.583° N, 3.481° E Uncertainty ± 5.0 km |
| Event ID | ROB 7285 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-11-16 12:00:50 Belgian time
Location map
- Epicentre
- Station that recorded the event
Arrival times at the stations
Each station first records the P wave, the fastest, then the S wave. The farther a station is from the epicentre, the later the waves reach it and the wider the gap between the two.
- Stations
- 12
- Epicentral distance
- 29.3 – 194.6km
- Mean velocity, P wave
- 5.6km/s
- P wave
- S wave
- Curve fitted to the measurements
Notes and method
Curves: travel time of a direct wave in a homogeneous medium. The velocity of each wave and an origin-time shift, common to both, are fitted to the measurements by least squares. Depth not determined: hypocenter placed at the surface for the calculation. P wave: 8 measurements, root-mean-square deviation 0.45 s.
Stations farther than 120 km are left out of the fit: the first waves to reach them have travelled beneath the crust, through the mantle, where they propagate faster.
Station measurements
P- and S-wave arrivals and ground displacement measured at each station. Click a column heading to change the order.
| km | ° | UTC | UTC | s | |
|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)12 stations | |||||
| LESLessines | 29.3 | 61 | 09:52:24.71+4.83 s | 09:52:28.43+8.55 s | 3.72 |
| BOUBougnies | 39.4 | 123 | 09:52:27.27+7.39 s | – | – |
| SKQSteenkerque | 43.0 | 80 | 09:52:26.92+7.04 s | – | – |
| BRQBracquegnies | 47.8 | 103 | 09:52:28.09+8.21 s | – | – |
| RQRRonquières | 52.8 | 87 | 09:52:28.40+8.52 s | – | – |
| DOUDourbes | 96.1 | 124 | 09:52:36.49+16.61 s | – | – |
| MRDMaredsous | 96.6 | 108 | 09:52:36.15+16.27 s | – | – |
| GESGesves | 116.1 | 100 | 09:52:40.81+20.93 s | – | – |
| CLAClavier | 130.5 | 97 | 09:52:41.34+21.46 s | – | – |
| DSLBDessel | 132.8 | 56 | 09:52:42.07+22.19 s | – | – |
| MOLTMol | 133.0 | 58 | 09:52:42.72+22.84 s | – | – |
| KLBKalborn | 194.6 | 105 | 09:52:51.26+31.38 s | – | – |